Medical Design Briefs - November 2024 - 43

Medical Machining
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For over 55 years, Guill has manufactured
medical parts and tooling with great attention
to customer specifications. Their new
medical machining program offers 5-axis
machining centers, high precision
machining and full wire EDM capabilities.
Machining capabilities range from small
hole machining .008 " in diameter, to material
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The company now offers its substantial machine shop
capabilities as an independent service to customers in
the medical field as well as other markets.
Miniaturized Brain-Machine Interface (MiBMI). (Credit: EPFL/Lundi13 - CC-BY-SA 4.0)
to practical, implantable solutions that can significantly enhance
communication abilities for individuals with severe motor
impairments, " says Shoaran.
Brain-to-text conversion involves decoding neural signals
generated when a person imagines writing letters or words. In
this process, electrodes implanted in the brain record neural
activity associated with the motor actions of handwriting. The
MiBMI chipset then processes these signals in real-time, translating
the brain's intended hand movements into corresponding
digital text. This technology allows individuals, especially
those with locked-in syndrome and other severe motor impairments,
to communicate by simply thinking about writing,
with the interface converting their thoughts into readable
text on a screen.
" While the chip has not yet been integrated into a working
BMI, it has processed data from previous live recordings,
such as those from the Shenoy lab at Stanford, converting
handwriting activity into text with an impressive 91 percent
accuracy, " says lead author Mohammed Ali Shaeri. The
chip can currently decode up to 31 different characters, an
achievement unmatched by any other integrated systems.
" We are confident that we can decode up to 100 characters,
but a handwriting dataset with more characters is not yet
available, " adds Shaeri.
Current BMIs record the data from electrodes implanted
in the brain and then send these signals to a separate computer
to do the decoding. The MiBMI chips records the data
but also processes the information in real time - integrating
a 192-channel neural recording system with a 512- channel
neural decoder. This neurotechnological breakthrough is a
feat of extreme miniaturization that combines expertise in
integrated circuits, neural engineering, and artificial intelligence.
This innovation is particularly exciting in the emerging
era of neurotech start-ups in the BMI domain, where
integration and miniaturization are key focuses. EPFL's MiBMI
offers promising insights and potential for the future of
the field.
To be able to process the massive amount of information
picked up by the electrodes on the miniaturized BMI, the researchers
had to take a completely different approach to data
analysis. They discovered that the brain activity for each letter,
Medical Design Briefs, November 2024
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Medical Design Briefs - November 2024

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